<template>
  <div class="component-upload-image video">
    <div class="video-wrap">
      <div v-for="(p, i) in previewList" v-show="previewList.length" :key="i" class="video-list">
        <video v-if="false" class="video-item" :src="p.url" controls controlsList="nodownload"></video>
        <i class="el-icon-delete del" @click="delHandler(i)"></i>
        <video-preview width="148px" height="148px" :src="p"></video-preview>
      </div>
      <div v-if="showTip" class="upload-box">
        <el-upload
          drag
          :action="uploadImgUrl"
          :on-success="handleUploadSuccess"
          :before-upload="handleBeforeUpload"
          :limit="limit"
          :on-error="handleUploadError"
          :on-exceed="handleExceed"
          name="file"
          :on-remove="handleRemove"
          :show-file-list="false"
          :headers="headers"
          :file-list="fileList"
        >
          <i class="el-icon-upload"></i>
          <div class="el-upload__text">点击上传</div>
        </el-upload>
      </div>

    </div>

    <div v-if="showTip" slot="tip" class="el-upload__tip">
      请上传
      <template v-if="fileSize">
        大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
      </template>
      <template v-if="fileType">
        格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b>
      </template>
      的文件
    </div>

    <el-dialog :visible.sync="dialogVisible" title="预览" width="800" append-to-body>
      <img :src="dialogImageUrl" style="display: block; max-width: 100%; margin: 0 auto" />
    </el-dialog>
  </div>
</template>

<script>
import {
  getToken
} from "@/utils/auth";
// import baseURL from "@/config/url";
import VideoPreview from "../VideoPreview";

export default {
  components: { VideoPreview },
  props: {
    value: [String, Object, Array],
    // 数量限制
    limit: {
      type: Number,
      "default": 5
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      "default": 500
    },
    // 文件类型, 例如['png', 'jpg', 'jpeg']
    fileType: {
      type: Array,
      "default": () => ["mp4"]
    },
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      "default": true
    }
  },
  data() {
    return {
      dialogImageUrl: "",
      dialogVisible: false,
      hideUpload: false,
      // baseUrl: baseURL,
      uploadImgUrl: `${process.env.VUE_APP_BASE_API}/system/oss/upload`, // 上传的图片服务器地址
      headers: {
        Authorization: `Bearer ${getToken()}`
      },
      fileList: [],
      previewList: [],
      preStrs: ''
    };
  },
  computed: {
    // 是否显示提示
    showTip() {
      return this.isShowTip && (this.fileType || this.fileSize);
    }
  },
  watch: {
    preStrs(val) {
      if (!val) {
        this.previewList = []
      } else {
        const list = val.split(',')
        this.previewList = list.map(item => {
          return item
        })
      }
    },
    value: {
      handler(val) {
        if (val) {
          // 首先将值转为数组
          console.log(val, 'val')
          const list = Array.isArray(val) ? val : this.value.split(",");
          this.previewList = list;
          // 然后将数组转为对象数组
          this.fileList = list.map(item => {
            if (typeof item === "string") {
              // if (item.indexOf(this.baseUrl) === -1) {
              //   item = { name: this.baseUrl + item, url: this.baseUrl + item };
              // } else {
              //   item = { name: item, url: item };
              // }
              item = {
                name: item,
                url: item
              };
            }
            return item;
          });
        } else {
          this.fileList = [];
          this.previewList = [];
          return [];
        }
      },
      deep: true,
      immediate: true
    }
  },
  methods: {
    delHandler(index) {
      this.fileList.splice(index, 1)
      this.$emit("input", this.listToString(this.fileList));
    },
    // 删除图片
    handleRemove(file, fileList) {
      const findex = this.fileList.map(f => f.name).indexOf(file.name);
      this.fileList.splice(findex, 1);
      this.$emit("input", this.listToString(this.fileList));
      this.$emit("uploadSuccess", this.fileList);
    },
    // 上传成功回调
    handleUploadSuccess(res) {
      if (res.code === 500) {
        this.$message.error(res.msg);
        this.loading.close();
        this.fileList = [];
        return false;
      }
      this.fileList.push({
        name: res.data.fileName,
        ossId: res.data.ossId,
        url: res.data.url
      });
      this.$emit("input", this.listToString(this.fileList));
      this.$emit("uploadSuccess", this.fileList);
      this.$message.success('上传成功')
      this.loading.close();
    },
    // 上传前loading加载
    handleBeforeUpload(file) {
      let isImg = false;
      if (this.fileType.length) {
        let fileExtension = "";
        if (file.name.lastIndexOf(".") > -1) {
          fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
        }
        isImg = this.fileType.some(type => {
          if (file.type.indexOf(type) > -1) return true;
          if (fileExtension && fileExtension.indexOf(type) > -1) return true;
          return false;
        });
      } else {
        isImg = file.type.indexOf("image") > -1;
      }

      if (!isImg) {
        this.$message.error(
          `文件格式不正确, 请上传${this.fileType.join("/")}格式文件!`
        );
        return false;
      }
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$message.error(`上传头像图片大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      this.loading = this.$loading({
        lock: true,
        text: "上传中",
        background: "rgba(0, 0, 0, 0.7)"
      });
    },
    // 文件个数超出
    handleExceed() {
      this.$message.error(`上传文件数量不能超过 ${this.limit} 个!`);
    },
    // 上传失败
    handleUploadError() {
      this.$message({
        type: "error",
        message: "上传失败"
      });
      this.loading.close();
    },
    // 预览
    handlePictureCardPreview(file) {
      this.dialogImageUrl = file.url;
      this.dialogVisible = true;
    },
    // 对象转成指定字符串分隔
    listToString(list, separator) {
      console.log(list)
      let strs = "";
      separator = separator || ",";
      list.forEach(item => {
        strs += item.ossId + separator;
      });
      // for (let i in list) {
      //   strs += list[i].url + separator;
      // }
      this.preStrs = strs !== "" ? strs.substr(0, strs.length - 1) : "";
      console.log(this.preStrs, 'ps')
      return this.preStrs;
    }
  }
};

</script>
<style lang="scss">
.el-upload-dragger {

    width: 148px !important;
    height: 148px !important;
    .el-icon-upload {
        margin: 25px 0 16px;
        font-size: 50px;
    }
}
</style>
<style scoped lang="scss">
.video-wrap {
    display: flex;
    flex-wrap: wrap;
    .upload-box {
        width: 148px;
        height: 148px;
    }
    .video-list {
        width: 148px;
        height: 148px;
        margin-right: 10px;
        margin-bottom: 10px;
        border-radius: 10px;
        overflow: hidden;
        position: relative;
        .del {
            color: red;
            font-size: 18px;
            position: absolute;
            top: 10px;
            right: 10px;
            cursor: pointer;
            z-index: 99;
        }
        .video-item {
            width: 100%;
            height: 100%;
        }
    }
}
    // .el-upload--picture-card 控制加号部分
    ::v-deep.hide .el-upload--picture-card {
        display: none;
    }

    // 去掉动画效果
    ::v-deep .el-list-enter-active,
    ::v-deep .el-list-leave-active {
        transition: all 0s;
    }

    ::v-deep .el-list-enter,
    .el-list-leave-active {
        opacity: 0;
        transform: translateY(0);
    }

</style>
